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Provider for Google Calendar
Provider for Google Calendar connects Thunderbird with Google Calendar for full task sync, conference details, and scheduling support. It offers deeper integration than Thunderbird’s native support using Google’s official API.
British English Dictionary (Marco Pinto)
A fork of Mark Tyndall's add-on, based on David Bartlett's
British Dictionary R1.19 for Firefox, Thunderbird and SeaMonkey.
English United States Dictionary
English United States (en-US) Dictionary as shipped with Thunderbird 115 ESR and Firefox 115 ESR.
Deutsches Wörterbuch
Deutsches Wörterbuch (neue Rechtschreibung) für die Rechtschreibprüfung in Mozilla-Produkten
Diccionario de Español/España
CardBook
Featured
A new Thunderbird address book based on the CardDAV and vCard standards.
Twitter: @CardBookAddon
ExQuilla for Exchange
Thunderbird email accounts connecting to Microsoft Exchange Web Services.
Mail Merge
Create and Save or Send Multiple Individual and Personalized Messages from a Draft
DKIM Verifier
Send Later
Thunderbird Conversations
Featured
This addon provides a conversation view for Thunderbird, grouping messages together and allowing you to reply "inline" thus providing a more efficient workflow.
Signature Switch
Switch the signature on/off or choose a new one from your predefined set.
QuickFolders (Tabbed Folders)
The "Swiss army knife" of folders. Turn your favorites into tabs - open folders and subfolders, move mails without scrolling around or searching. powerful + easy.
See new mail at a glance after automatic filtering - supports quickFilters addon!
To create your own collections, you must have a Mozilla Add-ons account.
